TOEFL Listening: ETS-TOEFL听力机经 - 1CFG5B4CCGE3MQH4P$

What option does the professor express about the intarsia technique? A. The technique is not known and appreciated enough by the people nowadays B. The money spent on artworks made using this technique should help citizens instead C. The technique was probably more highly respected than painting doing the Italian Renaissance D. The sale of artworks made using this technique was probably once central to the economies of Italian cities